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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






2. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






3. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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4. The more stressed out the male is - the less sperm he is going to produce






5. (LH) stimulates the Leydig cells to produce testosterone






6. 1-3 days






7. 1. brain function - 2. blood flow - 3. willing female






8. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






9. Animals which have many estrous periods per year (ex: cow - sow)






10. Superior genes are _______ to multiply






11. Implies the amount of estrogen production






12. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






13. 1-3 days






14. Birthing process (termination of gestation)






15. Produce testosterone. located between the seminiferous tubules






16. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






17. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






18. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






19. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






20. Milk ~305 days - dry 60 days prior to calving






21. Start of the reproductive tract for the female. located outside of the body






22. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






23. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






24. 4-6 days






25. 265-285 days






26. Animals which have only one estrous cycle (ex: dog - fox)






27. Microscopic - make sure not sterile - very few bulls are actually tested






28. Front feet and head first. (except for hogs and dogs)






29. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






30. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






31. Duct through penis that carries sperm and urine






32. Contains and regulates the temp of the testes for sperm production






33. Sperm is produced here






34. Can survive ~7 days in cow. vast majority <48 hours






35. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






36. (FSH) causes egg to mature in females






37. Duct through penis that carries sperm and urine






38. What about the sperm for a bull which has been castrated but still has testicles?






39. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






40. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






41. 30-38 hours after estrus cycle begins






42. Contains and regulates the temp of the testes for sperm production






43. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






44. FEED






45. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






46. Front feet and head first. (except for hogs and dogs)






47. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






48. Look for infection - split - and rupture of the penis






49. Actual heat cycle (period)






50. Why does estrus happen before ovulation?